Android Engineer · Kotlin & Jetpack Compose
Based in Tbilisi, Georgia. Open to relocation to the US, Canada, Europe, and the UAE.
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Android engineer with 4+ years of experience building and shipping consumer apps with Kotlin and Jetpack Compose. I lead Android development in Galaksion’s in-house mobile studio, where I own technical decisions, architecture and Google Play releases, and work directly with product on what we build next and how it earns money.
My strongest area is the part of mobile development that touches revenue: Google Play Billing subscriptions and regional pricing (subscription conversion up 15–25%), server-side purchase validation, install attribution, and analytics with A/B experiments. CI/CD pipelines I built cut manual release work by about 40%.
Commercial Android case studies, a runnable open-source code sample and a testing tool.
| Project | Android work | Explore |
|---|---|---|
| Offer Catalog | Open-source Compose catalog with cancellable search, pagination, state restoration and behaviour tests. | Source & run instructions · Checks |
| process-death-check | Kotlin CLI and Gradle plugin that kills an app the way Android does in the background, brings it back and fails on restore crashes or lost input. CI runs on API 26 and 36. | Source · Gradle plugin · Checks |
| ClickMoney | Offer discovery, reward flows, analytics, and verified APK updates. Full Android ownership. | Case study · Demo |
| Core Defense | Device security insights, on-device scoring, Google Play Billing, analytics, and release delivery. | Case study · Demo |
| Zephyr Browser | WebView browser with per-country proxy routing through AndroidX WebKit, EasyList-based ad blocking and private mode. 10K+ installs on Google Play. | Case study |
| Future Lines | AI palmistry app: guided CameraX capture with an ML Kit hand check, plus Google Play and direct-APK builds with separate billing. | Case study |
- Led development and Google Play release of Core Defense, an Android device security app, including on-device risk scoring from 20+ permission and behavior signals.
- Shipped Google Play Billing subscriptions with several plans and regional pricing; subscription conversion rose 15–25%.
- Added server-side purchase validation and Install Referrer attribution, with purchase-token deduplication.
- Wrote a single analytics layer over Firebase and AppMetrica with funnel events and Remote Config A/B tests.
- Shipped Zephyr Browser to Google Play (10K+ installs): a WebView browser with tabs, private mode, a JavaScript bridge, EasyList-based ad blocking and per-country proxy routing via AndroidX WebKit ProxyController.
- Shipped Future Lines, an AI palmistry app, to Google Play: a CameraX capture flow where ML Kit pose detection checks the hand against the guide frame, plus Google Play and direct-APK flavors with separate billing paths.
- Built the real-time chat module of a dating app for the UAE, Qatar and Saudi Arabia in Jetpack Compose.
- Set up GitLab CI/CD for Android builds and releases; manual release work dropped by about 40%.
- Now building a shared Android foundation (project template plus billing, analytics, attribution and Remote Config modules) for new studio apps.
Android: Kotlin, Jetpack Compose, Android SDK, XML, Coroutines & Flow, WebView, CameraX, ML Kit
Architecture: Clean Architecture, MVVM/MVI, unidirectional data flow
Data & integrations: Hilt/Dagger, Retrofit, OkHttp, Room, DataStore, WorkManager
Product & delivery: Google Play Billing, Firebase, AppMetrica, GitLab CI/CD
Testing: JUnit, Mockito, Espresso, Kaspresso
Explore my experience and project case studies at byfedin.dev. The pinned repositories include my commercial Android case studies, an independent, runnable code sample and an open-source testing tool.
For Android engineering opportunities: evgenii@byfedin.dev
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